use strict;
use warnings;
+do {
+ my %METACLASS_CACHE;
+
+ # because Mouse doesn't introspect existing classes, we're forced to
+ # only pay attention to other Mouse classes
+ sub _metaclass_cache {
+ my $class = shift;
+ my $name = shift;
+ return $METACLASS_CACHE{$name};
+ }
+
+ sub initialize {
+ my $class = shift;
+ my $name = shift;
+ $METACLASS_CACHE{$name} = $class->new(name => $name)
+ if !exists($METACLASS_CACHE{$name});
+ return $METACLASS_CACHE{$name};
+ }
+};
+
+sub new {
+ my $class = shift;
+ my %args = @_;
+
+ $args{attributes} ||= {};
+
+ bless \%args, $class;
+}
+
+sub name { $_[0]->{name} }
+
+sub add_attribute {
+ my $self = shift;
+ my $name = shift;
+ my $spec = shift;
+ $self->{attributes}->{$name} = $spec;
+}
+
+sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
+sub get_attribute_list { keys %{ $_[0]->{attributes} } }
+sub get_attribute { $_[0]->{attributes}->{$_[1]} }
+
+sub apply {
+ my $self = shift;
+ my $class = shift;
+
+ for my $name ($self->get_attribute_list) {
+ next if $class->has_attribute($name);
+ my $spec = $self->get_attribute($name);
+ Mouse::Meta::Attribute->create($class, $name, %$spec);
+ }
+
+ for my $modifier_type (qw/before after around/) {
+ my $add_method = "add_${modifier_type}_method_modifier";
+ my $modified = $self->{"${modifier_type}_method_modifiers"};
+
+ for my $method_name (keys %$modified) {
+ for my $code (@{ $modified->{$method_name} }) {
+ $class->$add_method($method_name => $code);
+ }
+ }
+ }
+}
+
+for my $modifier_type (qw/before after around/) {
+ no strict 'refs';
+ *{ __PACKAGE__ . '::' . "add_${modifier_type}_method_modifier" } = sub {
+ my ($self, $method_name, $method) = @_;
+
+ push @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} },
+ $method;
+ };
+
+ *{ __PACKAGE__ . '::' . "get_${modifier_type}_method_modifiers" } = sub {
+ my ($self, $method_name, $method) = @_;
+ @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} || [] }
+ };
+}
1;